1.how will you determine when all of the reactant has been converted into products?2.why is the...

Question

1.how will you determine when all of the reactant has been converted into products?2.why is the crucible and its contents heated gently (ot vigorously) at the start of the reaction?
3.what is the proper method of disposal for the solid products formed in the reaction?
4.why is a clay crucible used as the reaction container insteaed of a test tube?
5.how do you safely handle a hot crucible?
6.does the iron in FeC2O4*2H2O change oxidation number during the heating process? If so, what is the change?

David · Accepted Answer

1. How will you determine when all of the reactant has been converted into products? 
Solution: It depends on the type of reaction. This is explaining with the help of few examples. 
 If you have solid reactants and gaseous products, then at the end of the reaction, there should be 
no visible solid reactants left.  
 When the reaction between Mg & O2 is completed, the fire goes out and there is not any Mg left. 
It has all escaped as a white dust. 
 In neutralization reaction between NaOH &HCl, you have to test the pH to make sure that you 
have placed equivalent amounts of the reactants. 
 If you are referring to a problem where the chemical reaction is given as well as the concentration 
of reactants or products,

1.how will you determine when all of the reactant has been converted into products?2.why is the crucible and its contents heated gently (ot vigorously) at the start of the reaction? 3.what is the...

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